Set Over-Voltage Protection (Ovp) - ITech IT-M3900D Series User Manual

4.5.1 Set Over-Voltage Protection (OVP)

Users can enable the OVP function and set the protection limit Level and pro-
tection delay time Delay. When the voltage (i.e., the Meter value) is greater than
this protection limit and the delay time is exceeded, the power supply will enter
the OVP state.
Possible Cause
Many reasons can cause OVP, the details are as follows:
•
•
•
How to Set
The operation steps to set OVP are as follows.
1. Press the composite keys [Protect] on the front panel to enter the protection
2. Press the composite keys [Shift]+[Recall] (Protect) on the front panel to en-
3. Rotate the knob to select 1. OVP (Off) and press [Enter].
4. Press the left/right key or rotate the knob to select On and press [Enter] to
5. Set the protection limit Level and the delay time Delay in sequence, and
The set protection limit Level is lower than the voltage Meter value.
The external (AC input) inputs a higher voltage.
The power supply outputs a high voltage due to a fault.
Please avoid inputting a external voltage higher than 120% rated
value, or the instrument will be damaged.
menu. (1U Model)
ter the protection menu. (2U Model)
enter the setting interface.
press [Enter] to confirm.
The VFD screen returns to the Protect menu and the OVP setting (take
150V, 1S as an example) is displayed as follows:
PROTECT
1.OVP 150V, 1S
Copyright © Itech Electronic Co., Ltd.
Power Supply Function
50